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-rw-r--r--Documentation/git-update-ref.txt5
-rw-r--r--builtin-branch.c2
-rw-r--r--builtin-fetch--tool.c2
-rw-r--r--builtin-reflog.c2
-rw-r--r--builtin-update-ref.c11
-rw-r--r--fast-import.c2
-rwxr-xr-xgit-checkout.sh10
-rw-r--r--receive-pack.c2
-rw-r--r--refs.c30
-rw-r--r--refs.h3
10 files changed, 39 insertions, 30 deletions
diff --git a/Documentation/git-update-ref.txt b/Documentation/git-update-ref.txt
index 9424fea..f222616 100644
--- a/Documentation/git-update-ref.txt
+++ b/Documentation/git-update-ref.txt
@@ -7,7 +7,7 @@ git-update-ref - Update the object name stored in a ref safely
SYNOPSIS
--------
-'git-update-ref' [-m <reason>] (-d <ref> <oldvalue> | <ref> <newvalue> [<oldvalue>])
+'git-update-ref' [-m <reason>] (-d <ref> <oldvalue> | [--no-deref] <ref> <newvalue> [<oldvalue>])
DESCRIPTION
-----------
@@ -36,6 +36,9 @@ them and update them as a regular file (i.e. it will allow the
filesystem to follow them, but will overwrite such a symlink to
somewhere else with a regular filename).
+If --no-deref is given, <ref> itself is overwritten, rather than
+the result of following the symbolic pointers.
+
In general, using
git-update-ref HEAD "$head"
diff --git a/builtin-branch.c b/builtin-branch.c
index 7408285..6bd5843 100644
--- a/builtin-branch.c
+++ b/builtin-branch.c
@@ -462,7 +462,7 @@ static void create_branch(const char *name, const char *start_name,
die("Not a valid branch point: '%s'.", start_name);
hashcpy(sha1, commit->object.sha1);
- lock = lock_any_ref_for_update(ref, NULL);
+ lock = lock_any_ref_for_update(ref, NULL, 0);
if (!lock)
die("Failed to lock ref for update: %s.", strerror(errno));
diff --git a/builtin-fetch--tool.c b/builtin-fetch--tool.c
index 2065466..b14e78a 100644
--- a/builtin-fetch--tool.c
+++ b/builtin-fetch--tool.c
@@ -42,7 +42,7 @@ static int update_ref(const char *action,
if (!rla)
rla = "(reflog update)";
snprintf(msg, sizeof(msg), "%s: %s", rla, action);
- lock = lock_any_ref_for_update(refname, oldval);
+ lock = lock_any_ref_for_update(refname, oldval, 0);
if (!lock)
return 1;
if (write_ref_sha1(lock, sha1, msg) < 0)
diff --git a/builtin-reflog.c b/builtin-reflog.c
index 4c39f1d..ce093ca 100644
--- a/builtin-reflog.c
+++ b/builtin-reflog.c
@@ -249,7 +249,7 @@ static int expire_reflog(const char *ref, const unsigned char *sha1, int unused,
/* we take the lock for the ref itself to prevent it from
* getting updated.
*/
- lock = lock_any_ref_for_update(ref, sha1);
+ lock = lock_any_ref_for_update(ref, sha1, 0);
if (!lock)
return error("cannot lock ref '%s'", ref);
log_file = xstrdup(git_path("logs/%s", ref));
diff --git a/builtin-update-ref.c b/builtin-update-ref.c
index 5ee960b..feac2ed 100644
--- a/builtin-update-ref.c
+++ b/builtin-update-ref.c
@@ -3,16 +3,17 @@
#include "builtin.h"
static const char git_update_ref_usage[] =
-"git-update-ref [-m <reason>] (-d <refname> <value> | <refname> <value> [<oldval>])";
+"git-update-ref [-m <reason>] (-d <refname> <value> | [--no-deref] <refname> <value> [<oldval>])";
int cmd_update_ref(int argc, const char **argv, const char *prefix)
{
const char *refname=NULL, *value=NULL, *oldval=NULL, *msg=NULL;
struct ref_lock *lock;
unsigned char sha1[20], oldsha1[20];
- int i, delete;
+ int i, delete, ref_flags;
delete = 0;
+ ref_flags = 0;
git_config(git_default_config);
for (i = 1; i < argc; i++) {
@@ -30,6 +31,10 @@ int cmd_update_ref(int argc, const char **argv, const char *prefix)
delete = 1;
continue;
}
+ if (!strcmp("--no-deref", argv[i])) {
+ ref_flags |= REF_NODEREF;
+ continue;
+ }
if (!refname) {
refname = argv[i];
continue;
@@ -59,7 +64,7 @@ int cmd_update_ref(int argc, const char **argv, const char *prefix)
if (oldval && *oldval && get_sha1(oldval, oldsha1))
die("%s: not a valid old SHA1", oldval);
- lock = lock_any_ref_for_update(refname, oldval ? oldsha1 : NULL);
+ lock = lock_any_ref_for_update(refname, oldval ? oldsha1 : NULL, ref_flags);
if (!lock)
die("%s: cannot lock the ref", refname);
if (write_ref_sha1(lock, sha1, msg) < 0)
diff --git a/fast-import.c b/fast-import.c
index 3a2d5ed..ffa00fd 100644
--- a/fast-import.c
+++ b/fast-import.c
@@ -1271,7 +1271,7 @@ static int update_branch(struct branch *b)
if (read_ref(b->name, old_sha1))
hashclr(old_sha1);
- lock = lock_any_ref_for_update(b->name, old_sha1);
+ lock = lock_any_ref_for_update(b->name, old_sha1, 0);
if (!lock)
return error("Unable to lock %s", b->name);
if (!force_update && !is_null_sha1(old_sha1)) {
diff --git a/git-checkout.sh b/git-checkout.sh
index ed7c2c5..6b6facf 100755
--- a/git-checkout.sh
+++ b/git-checkout.sh
@@ -270,15 +270,7 @@ if [ "$?" -eq 0 ]; then
fi
elif test -n "$detached"
then
- # NEEDSWORK: we would want a command to detach the HEAD
- # atomically, instead of this handcrafted command sequence.
- # Perhaps:
- # git update-ref --detach HEAD $new
- # or something like that...
- #
- git-rev-parse HEAD >"$GIT_DIR/HEAD.new" &&
- mv "$GIT_DIR/HEAD.new" "$GIT_DIR/HEAD" &&
- git-update-ref -m "checkout: moving to $arg" HEAD "$detached" ||
+ git-update-ref --no-deref -m "checkout: moving to $arg" HEAD "$detached" ||
die "Cannot detach HEAD"
if test -n "$detach_warn"
then
diff --git a/receive-pack.c b/receive-pack.c
index 26aa26b..d3c422b 100644
--- a/receive-pack.c
+++ b/receive-pack.c
@@ -209,7 +209,7 @@ static const char *update(struct command *cmd)
return NULL; /* good */
}
else {
- lock = lock_any_ref_for_update(name, old_sha1);
+ lock = lock_any_ref_for_update(name, old_sha1, 0);
if (!lock) {
error("failed to lock %s", name);
return "failed to lock";
diff --git a/refs.c b/refs.c
index 89876bf..2ae3235 100644
--- a/refs.c
+++ b/refs.c
@@ -736,19 +736,20 @@ static int is_refname_available(const char *ref, const char *oldref,
return 1;
}
-static struct ref_lock *lock_ref_sha1_basic(const char *ref, const unsigned char *old_sha1, int *flag)
+static struct ref_lock *lock_ref_sha1_basic(const char *ref, const unsigned char *old_sha1, int flags, int *type_p)
{
char *ref_file;
const char *orig_ref = ref;
struct ref_lock *lock;
struct stat st;
int last_errno = 0;
+ int type;
int mustexist = (old_sha1 && !is_null_sha1(old_sha1));
lock = xcalloc(1, sizeof(struct ref_lock));
lock->lock_fd = -1;
- ref = resolve_ref(ref, lock->old_sha1, mustexist, flag);
+ ref = resolve_ref(ref, lock->old_sha1, mustexist, &type);
if (!ref && errno == EISDIR) {
/* we are trying to lock foo but we used to
* have foo/bar which now does not exist;
@@ -761,8 +762,10 @@ static struct ref_lock *lock_ref_sha1_basic(const char *ref, const unsigned char
error("there are still refs under '%s'", orig_ref);
goto error_return;
}
- ref = resolve_ref(orig_ref, lock->old_sha1, mustexist, flag);
+ ref = resolve_ref(orig_ref, lock->old_sha1, mustexist, &type);
}
+ if (type_p)
+ *type_p = type;
if (!ref) {
last_errno = errno;
error("unable to resolve reference %s: %s",
@@ -780,10 +783,15 @@ static struct ref_lock *lock_ref_sha1_basic(const char *ref, const unsigned char
lock->lk = xcalloc(1, sizeof(struct lock_file));
+ if (flags & REF_NODEREF)
+ ref = orig_ref;
lock->ref_name = xstrdup(ref);
lock->orig_ref_name = xstrdup(orig_ref);
ref_file = git_path("%s", ref);
- lock->force_write = lstat(ref_file, &st) && errno == ENOENT;
+ if (lstat(ref_file, &st) && errno == ENOENT)
+ lock->force_write = 1;
+ if ((flags & REF_NODEREF) && (type & REF_ISSYMREF))
+ lock->force_write = 1;
if (safe_create_leading_directories(ref_file)) {
last_errno = errno;
@@ -806,14 +814,14 @@ struct ref_lock *lock_ref_sha1(const char *ref, const unsigned char *old_sha1)
if (check_ref_format(ref))
return NULL;
strcpy(refpath, mkpath("refs/%s", ref));
- return lock_ref_sha1_basic(refpath, old_sha1, NULL);
+ return lock_ref_sha1_basic(refpath, old_sha1, 0, NULL);
}
-struct ref_lock *lock_any_ref_for_update(const char *ref, const unsigned char *old_sha1)
+struct ref_lock *lock_any_ref_for_update(const char *ref, const unsigned char *old_sha1, int flags)
{
if (check_ref_format(ref) == -1)
return NULL;
- return lock_ref_sha1_basic(ref, old_sha1, NULL);
+ return lock_ref_sha1_basic(ref, old_sha1, flags, NULL);
}
static struct lock_file packlock;
@@ -858,7 +866,7 @@ int delete_ref(const char *refname, const unsigned char *sha1)
struct ref_lock *lock;
int err, i, ret = 0, flag = 0;
- lock = lock_ref_sha1_basic(refname, sha1, &flag);
+ lock = lock_ref_sha1_basic(refname, sha1, 0, &flag);
if (!lock)
return 1;
if (!(flag & REF_ISPACKED)) {
@@ -909,7 +917,7 @@ int rename_ref(const char *oldref, const char *newref, const char *logmsg)
if (!is_refname_available(newref, oldref, get_loose_refs(), 0))
return 1;
- lock = lock_ref_sha1_basic(renamed_ref, NULL, NULL);
+ lock = lock_ref_sha1_basic(renamed_ref, NULL, 0, NULL);
if (!lock)
return error("unable to lock %s", renamed_ref);
lock->force_write = 1;
@@ -963,7 +971,7 @@ int rename_ref(const char *oldref, const char *newref, const char *logmsg)
}
logmoved = log;
- lock = lock_ref_sha1_basic(newref, NULL, NULL);
+ lock = lock_ref_sha1_basic(newref, NULL, 0, NULL);
if (!lock) {
error("unable to lock %s for update", newref);
goto rollback;
@@ -979,7 +987,7 @@ int rename_ref(const char *oldref, const char *newref, const char *logmsg)
return 0;
rollback:
- lock = lock_ref_sha1_basic(oldref, NULL, NULL);
+ lock = lock_ref_sha1_basic(oldref, NULL, 0, NULL);
if (!lock) {
error("unable to lock %s for rollback", oldref);
goto rollbacklog;
diff --git a/refs.h b/refs.h
index f61f6d9..f234eb7 100644
--- a/refs.h
+++ b/refs.h
@@ -33,7 +33,8 @@ extern int get_ref_sha1(const char *ref, unsigned char *sha1);
extern struct ref_lock *lock_ref_sha1(const char *ref, const unsigned char *old_sha1);
/** Locks any ref (for 'HEAD' type refs). */
-extern struct ref_lock *lock_any_ref_for_update(const char *ref, const unsigned char *old_sha1);
+#define REF_NODEREF 0x01
+extern struct ref_lock *lock_any_ref_for_update(const char *ref, const unsigned char *old_sha1, int flags);
/** Release any lock taken but not written. **/
extern void unlock_ref(struct ref_lock *lock);